fix: check if passphrase is necessary before asking for it

Updates #2836

1 files changed, 6 insertions, 0 deletions

diff --git a/crypto/common/src/main/kotlin/app/passwordstore/crypto/CryptoHandler.kt b/crypto/common/src/main/kotlin/app/passwordstore/crypto/CryptoHandler.kt
index 898cf058..20a4d1d9 100644
--- a/crypto/common/src/main/kotlin/app/passwordstore/crypto/CryptoHandler.kt
+++ b/crypto/common/src/main/kotlin/app/passwordstore/crypto/CryptoHandler.kt
@@ -41,4 +41,10 @@ public interface CryptoHandler<Key, EncOpts : CryptoOptions, DecryptOpts : Crypt
 
   /** Given a [fileName], return whether this instance can handle it. */
   public fun canHandle(fileName: String): Boolean
+
+  /**
+   * Inspects the given encrypted [message] to notify user if a passphrase is necessary to decrypt
+   * it.
+   */
+  public fun isPassphraseProtected(message: InputStream): Boolean
 }